INTERNATIONAL RADIO CONVENTION. NOVEMBER 25,1927. §5. No new broadcasting station shall be authorized to work in the frequency band included between 160 and 224 kc/s (wave lengths 1,875-1,340 m.) unless no inconvenience therefrom will result to exist- ing radio communication services, including broadcasting services carried on by the stations which are already using· the frequencies included in this band, and stations the frequencies of which shall be changed to fall within this same band in conformity with the provision of paragraph 4 above. §6. The power of existing broadcasting stations using frequencies below 300 kc/s (wave lengths above 1,000 m.) shall not be increased if any inconvenience will result therefrom to existing radio commu- nication services. §7. The following table shows the allocation of frequencies (approxi- mate wave lengths) among the various services: kUocycles per wave lengths aecond (kC/s) in meters Services Freq:1encles in I Approximate
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10- 100 100- 110 110- 125 125- 150' 150- 160 11K- 285 285- S15 815- 350 • 350- 3GO 350- 390 890- 460 480- 485 485- 515 • 515- 6.'iO ~ 1,300' 1, 300- I, 500 I, 500- I, 715 I, 715- 2, 000 2,000- 2.250 2, 250- 2, 750 2, 750- 2, 850 2, 850- a, 500 3, 500- 4, 000 4, 000- 5, 500 5,500- 5 ,700 5, 700- 6, 000 6, 000- 6, 150 6, 150- 6, 1175 6,675 - 7,000 7.000 - 7,300 so. OOO-S, 000 3, a.Jo-2, 725 2,725-2,400 2, 400-2, 000 ' 2, 000 -1 ,875 1,875-1,6. ' iO 1,050 - 950 950- 850' 850- 830 830- 770 770- 650 650- 620 620- 580 • 580- 545 545- 230 • 23(}- 200 200- 175 175- 150 150- 133 133- 109 109- 105 105- 85 85- 75 75-54 54 - 52.7 52.7- 50 50 - 48.8 48.8 - 45 45 - 42.8 42. 8- 41 Fb:ed services. Fixed Servloos and mobUe services. Mobile services. Maritime mobile services open to public corrupo1\4ence excluriDelll. MobUe services. (a) Broadcasting. (b tFixed services. (c Mobile services. T e conditions for use of this band are subject to the following regional I arf8ll\!ements: AU regions where broadcastiI!g stations now exist work'}broadcasting log on frequencies below 300 kc/s (above lOOOm). • th -m {Fixed services. o er .....ons Mobile services. Regional 8lT8Iliements will respect the rights at other regions in this band. (at MobUe services. (b Fixed service. (c Broadcasting.
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not optn to public cOTrupondtnce. (d) Broadcasting within the band 194-224 kc/s (1~134Om). { (a) Mobile services except commercial ship stations. Other regions (b) Fixed air services exclmilldl/. (c) Fixed services not optn to public cOTrtlp(l1ldrnce. Radio beacons. Air mobile services exclmillell/. MobUe services not optn to public corrupondence. (a) Radio-compass service. (b) Mobile services, on condition that they do not Interfere with radio compass service. Mobile services. . Mobile services (except damped wavu and radiotelepllonll). MoNleservlces (distress, call, etc.) . Mobile services not oprn to public correlJ)Ondence (except damp'd lDatIU and radiottlepllonv). Broadcasting. (a) Broadcasting. M~611~:,~::.mobile services, waves of 1365 kc/s (220m) exclusively. { Mobile services. Fixed services. Amateurs. Mobile services and fixed services. Mobile services. Fixed services. Mobile services and fixed services. { Mobile services. Fixed services. Amateurs. Mobile services and fixed services. Mobile services. Fixed services. Broadcasting. MobUe services. Fixed services. Amateurs. I The wave of 143 kc/s (2.100m) is the calling Wave tor mobile stations using long continuous waves. • The wave at 333 kc/s (900m) is the international calling wave for air service. • The wave ot 500 kc/s (600m) 18 the international calling and distress wave. It may be used tor other purposes on condition that it will not interfere with call signals and distress signals. • Mobile services may use the band 6.'iO to 1,300 kc/s (545-230m) on condition that this will not cause Interference with the services at a country which uses this band exclusively tor broadcasting. 2851 Table at allocations.
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